Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a0abeef55bcddb…

MALICIOUS

PDF

87.2 KB Created: 2021-08-14 15:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c0c15023cce18aea095560f9a16b63dc SHA-1: afd2d61bb237284572f6dc7bbc1e9af866c5d532 SHA-256: d2a0abeef55bcddb638cb550b40cc4ba089b808377758ebaf1b45ee297a23d52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. The presence of embedded URLs and the nature of the link farm suggest the document is designed to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ketchas.ru/uplcv?utm_term=live+mobile+number+locator+app+free+download PDF link annotation
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8fee5e425---63194811519.pdfIn PDF document text
    • https://alutat.com/data/file/rakutefewotivujadepakarul.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/tasasetivanogixogufozemaz.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967d3815bfd---75903417338.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/34548385060.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e0a829a62---8114077023.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad87a45374---72589326602.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983f21959e3.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0882ae10---zabevasovazon.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/tigubuso.pdfIn PDF document text
    • http://samtekelektrik.com/files/buxabufofeg.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/vugokakalik.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/37705131412.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/93854749258.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/93641928463.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-15/20210515100046337619.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/80489088a9d5e89e3ffc7e6ac8a8055d/32066782430.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/38669635627.pdfIn PDF document text
    • http://afslab.asia/upload/files/bezasefavemukobumiga.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/lofewo.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/19386386273.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/0d51cfd67a58b54fc10c8d5ffa62d393/95058432121.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 10964 bytes
SHA-256: 163a4bb8a92e79655c434419592bea1870e4a523dcb8048e3a4f5b698d3e402c
font_01_sfnt_off000106d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D3 18080 bytes
SHA-256: 23744a35dcf6ab48fa21db89820a39be7aabe12793fd5f4862efd63f2cb0f4f5
font_02_sfnt_off00013697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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